Hans lutz



NITED STATES HANS LUTZ, OF NUREMBERG, AND

WILHELM SOHAEFER, OF MUNICH,

GERMANY.

FU RNACE.

SPECIFICATION forming part of Letters Patent No. 554,070, dated February 4, 1896.

Application lecl October l, 1894.

To all whom, it may concern:

Be it known that we, HANS LUTZ, of Nuremberg, and WILHELM SCHAEFER, of Munich, Bavaria, in the Empire of Germany, subjects of the King of Bavaria, have invented certain new and useful Improvements in Smokeless Furnaces, of which the following is a specification.

Furnaces at present in general use require great attention and intelligence onthe part of the stoker to secure perfect and smokeless combustion of the fuel. The fuel being put on irregularly and the fuel being supported by grates much loss is occasioned by imperfect combustion and by the loss of small fuel passing through the grates.

The object of our invention is to burn all of the combustible material of the fuel without loss and inthe simplest way by limiting the combustion to the surface of the fuel and preventing the escape of any fuel until it has been completely exposed to the heat and air.

Ie will first describe our invention with reference to the accompanying drawings and then point out in the claim the novel parts.

In said drawings, Figure I is a vertical sectional elevation of a furnace embodying our improvements. Fig. II is a horizontal sectional view thereof, the plane of section being indicated by the dotted line II II, Fig. I.

The fuelechamber R` has at front the inclined imperforate supporting-plateP and at rear the inclined series of air-inlet tubes or channels D, the arrangement being such that the chamber R is constructed downwardly, so that as the fuel flows downward and is consumed every part of' it may be more perfectly subjected to the currents of air let in by the tubes or channels D.

rlhe fuel is 'supplied to the chamber R through a feedingdoor H and slides downward on the plate P, but receives air only through the tube D; and hence is consumed only on its upper surface, the iiames which there develop passing into the spaces between Serial No. 524,609. (No model.)

the said tubes and thence to the furnaceflue F.

Slag and ashes pass down and are removed by a door A from ltime to time, as necessary. Air is supplied to the tubes F from air-chambers B in the side walls of the furnace, which are open at C to receive air from the space E below the plate P. Thus the air which is supplied to the burning surface of the fuel is preliminarily heated. No fresh fuel is ever put on the burning surface, but is first warmed as it passes thereto down the inclined plate P. The air is distributed evenly over the surface of the fuel. No material is allowed to pass through the plate P nor discharge until it has been completely combusted. A valve V is placed in the front of the chamberE to regulate the supply of air to the furnace and the speed of combustion. The pipes D are very durable, as they are cooled by air passing through them and are not encumbered with ashes and slag, so that the heated products of combustion circulate freely through them.

Having thus described our invention, the following is what we claim as new therein and desire to secure by Letters Patent:

In a smokeless furnace, the combination of the inclined imperforate plate P, the series of parallel air-tubes D arranged in an inclined plane over the plate P and forming between them and said plate a downwardly-constricted fuel passage or chamber, said tubesD having spaces or passages between them for the passage of the products of combustion and being` formed with air-openings in their faces adjacent to the plate P, fuel-inlet H, the air-chamber E below said plate P, and air-passages connecting with said air-tubes, substantially as set forth.

HANS LUTZ.

WILHELM SCHAEFER.

Witnesses:

MAX CoHN, AUG.. SONNTAGLEY. 

